No one can predict the price of crypto currencies accurately.
Price generally follow the price of Bitcoin, so when Bitcoin decreases price of all the alt coins will also decreases.
Crypto in general still has lot of potential in it. Especially if someone is targeting it for a longer period.
If someone intends to invest in this business, one should be very careful and have proper study of the crypto currencies, which he/she intend to buy.
The point here is one should invest only that much of amount which he can afford to hold for a longer period.
It’s my own opinion, I may be wrong but it seems that prices are at the lower side and eventually will go up if invested for the longer period.